Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jul. 31, 2020	Jan. 31, 2020
Current assets
Cash and cash equivalents	$ 15,813	$ 20,707
Accounts receivable, net	53,032	62,552
Inventories, net	51,302	53,899
Other current assets	5,814	5,436
Total current assets	125,961	142,594
Property, plant and equipment, net	104,937	100,850
Goodwill	105,703	106,509
Intangible assets, net	44,175	46,217
Other assets	11,001	7,087
TOTAL ASSETS	391,777	403,257
Current liabilities
Accounts payable	17,960	14,893
Accrued liabilities	20,422	20,743
Other current liabilities	3,013	2,287
Total current liabilities	41,395	37,923
Long-term debt	378	225
Other liabilities	32,453	29,161
Liabilities, Total	74,226	67,309
Commitments and contingencies (see Note 11)
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount	0	21,302
Shareholders' equity
Common stock, $1 par value, authorized shares 100,000; issued 67,510 and 67,436, respectively	67,510	67,436
Paid-in capital	64,690	61,508
Retained earnings	302,665	302,300
Accumulated other comprehensive loss	(6,131)	(5,415)
Treasury stock at cost, 31,665 and 31,665 shares, respectively	(111,183)	(111,183)
Total shareholders' equity	317,551	314,646
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 391,777	$ 403,257
Stockholders' Equity, Number of Shares, Par Value and Other Disclosures [Abstract]
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	67,510,000	67,436,000
Treasury Stock, Common, Shares	31,665,000	31,665,000